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CRT filter tweaks

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Ondřej Novák 2025-01-30 11:49:12 +01:00
parent ebcd71ece8
commit ab4a08ada5
1 changed files with 9 additions and 5 deletions
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14
platform/sdl/sdl_context.cpp
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@ -52,20 +52,24 @@ void SDLContext::generateCRTTexture(SDL_Renderer* renderer, SDL_Texture** textur
// Vytvoř novou texturu ve správné velikosti // Vytvoř novou texturu ve správné velikosti
*texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_STREAMING, width, height); *texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_STREAMING, width, height);
SDL_SetTextureBlendMode(*texture, SDL_BLENDMODE_BLEND); SDL_SetTextureBlendMode(*texture, SDL_BLENDMODE_MUL);
// Zamkni texturu pro přímý přístup k pixelům // Zamkni texturu pro přímý přístup k pixelům
void* pixels; void* pixels;
int pitch; int pitch;
SDL_LockTexture(*texture, nullptr, &pixels, &pitch); SDL_LockTexture(*texture, nullptr, &pixels, &pitch);
bool wider_lines = height > 1024;
// Vyplň texturu patternem (liché řádky tmavší) // Vyplň texturu patternem (liché řádky tmavší)
Uint32* pixelArray = (Uint32*)pixels; Uint32* pixelArray = (Uint32*)pixels;
Uint32 darkPixel = 0x00000080; // Černá s částečnou průhledností Uint32 darkPixel = wider_lines?0x808080FF:0xC0C0C0FF; // Černá s částečnou průhledností
Uint32 transparentPixel = 0x00000000; Uint32 transparentPixel = wider_lines ?0xFFFFFFE0:0xFFFFFFC0;
int step = wider_lines ?3:2;
for (int y = 0; y < height; y++) { for (int y = 0; y < height; y++) {
Uint32 color = (y % 3 == 0) ? darkPixel : transparentPixel; Uint32 color = (y % step == 0) ? darkPixel : transparentPixel;
for (int x = 0; x < width; x++) { for (int x = 0; x < width; x++) {
pixelArray[y * (pitch / 4) + x] = color; pixelArray[y * (pitch / 4) + x] = color;
} }
@ -354,7 +358,7 @@ void SDLContext::update_screen() {
SDL_SetTextureAlphaMod(_visible_texture, 255); SDL_SetTextureAlphaMod(_visible_texture, 255);
SDL_RenderCopy(_renderer.get(), _visible_texture, NULL, &winrc); SDL_RenderCopy(_renderer.get(), _visible_texture, NULL, &winrc);
} }
if (winrc.w > 1280 && winrc.h > 960) { if (winrc.h > 900) {
if (!_crt_effect) { if (!_crt_effect) {
SDL_Texture *txt; SDL_Texture *txt;
generateCRTTexture(_renderer.get(), &txt, 128, std::min<int>(1440, winrc.h)); generateCRTTexture(_renderer.get(), &txt, 128, std::min<int>(1440, winrc.h));